Telephone desk set



Oct. 9," 1928.

1,687,117 o. wx-:EBER

TELEPHONE DESK SET Fi1ed sept. 11, 1925 4 i 1 1U f Jf f/ /f. 7

1 5 Flg.' l Z 1 f l 5f ir A --l- 3 g o 7 //0 FZ5.' E 2 //l 1 f l @f I1-Luau DI"- TTE Meeker Patented Oct. 9, 1928.

UNiTED srarlisl PATENT OFFICE.

OTTO WEEBER, OF BERLIN, GERMANY, ASSIGNOR T0 SIEMENS & HALSKE lA IK'JIEZNGE- SELLSCHAFT, OF WERNERWERK, SIEMENSSTADT, NEAR BERLIN, GERMANY.

TELEPHONE DESK SET.

Application led September 11, 1925, Serial No. 55,650, and in Germany December 5, 1924.

This invention relates to telephone desk sets and is directed particularly to the formation of the hand telephone support of such sets.

In the usual hand telephone sets having a movable telephone support, the latter is firmly connected at its central portion with a switching rod, which is loosely guided in the base assembly of'the set, and according as to whether the hand telephone is put' on the support or removed therefrom, it acts by means of its axial displacement on contact springs of a switch arranged inside the set. As the hand telephone resting on the support is heavier at one end than at the other, owing to the receiver portion having greater weight than the transmitter portion, an unequal loading of the support takes place which requires a suitable structure for the hand tele hone for the purpose of en,- suring a satis actory actuation of the switching rod. Therefore, hand telephone supports of the kind described do not allow the application of light hand telephones.

Telephone sets are also known in which the support is iirmly connected to the casing.' In this arrangement the hand telephone resting on the support presses against a rod displaceably arranged 1n the center of the support. The rod is shifted when the hand telephone is manipulated and iniuences according to its position contacts of a switch located in the casing.

This arrangement is substantially simpler than the first mentioned, but it has disadvantages in so far as the switching rod adjoining the handle of the hand telephone prevents the grasping of the same, and when the hand telephone is .replaced obliquely, its weight-is only'lpartiallyused for the actuation of the rod. Thus the advantages of this arrangement as compared with the loose telephone support are partly lost by this drawback.v

The invention now aims at an improved mode of operation. The hand telephone support is firmly connected to the casing, and has allocated to it several switching members acting upon a switching device inside the casin and controlled directly by the hand telep one.

The switching members preferably in form of rods may be arranged at the two points of bearing of the hand telephone or else near the supporting members and act lrests on sai upon a common radially movable bridge which operates the Contact springs of a switch arranged inside the casing.v

The dra-wing', comprising Figs. l and 2, shows an embodiment ofthe invention.

Figure l is a front view of a desk set with the telephone at rest, some of the parts being shown in section.

Figure 2 is a side elevation of the set also partially in section, but with the telephone removed.

The drawing only shows those parts of the set which are essential for understanding the invention, while all remaining parts are left out for the sake of simplicity.

The casing 2 resting on the base 1 of the station is provided at the top at each side with a fork projection 3. These projections are preferably made out of o'ne iece with the casing 2, say of aluminum die cast or similar material. The two projections 3 form the support for the hand telephone 4 which in its normal position rests against the top of the rods 5 in the projections 3. These rods are movably located in openings of the projections 3 and protrude into the interior of the casing. With the same effeet, however, they can also be arranged against the projections. At their lower re,- duced ends 6, these rods rest against a plate 7 which is common to both rods and is r0- tatably mounted in the set. A spring urged rod 8 of the switching device 9, which includes also the switching springs 11, presses against the lower side of the plate 7. When the hand telephone is removed, the plate 7 is held by means of rod 8 in the position shown in Figure 2. The rods 5 project, in this position of the plate 7, beyond the bearing surface of the supports 3. If the hand telephone is put on the supports 3, then the rods 5 come into position as shown in Figure 1 as a result of the weight of the hand telephone. This position is also shown in dotted lines in Figure 2, in whichposition the collar 10 of the switching device keeps the contact springs 11 of the latter closed.

What is claimed is:

1. In a telephone desk set comprising a hand telephone and a base, a support for said hand telephone 'rigidly connected to said base, and a plurality of switching members projecting from said support and operable directl by said hand telephone as it support.

2. In a hand telephone desk set comprising a hand telephone and a lsupporting base, switching springs,a plurality of controlling members each directly operable by said hand telephone, and means directly controlled by each of said members individuall for operating said springs when the'han telephone is positioned on the supporting base.

3. In a hand telephone desk set, switching springs, a member for operating said springs each time the hand telephone is placed on or removed from the support of the set, a plurality of switching means directly and individually operable by said hand telephone, and a single member intermediate to said first member and said plurality of switching means for operating said first member to operate said springs.

4. In a telephone desk set, a hand telephone, a base containin switching springs, forked extensions on sai base for supporting said hand telephone, a plurality of operating members one of said members movably projecting midway between the prongs of each forked extension, and means directly controlled by each of said members individually each time said hand telephone is placed on or removed from said forked extensions.

' 5. In a telephone desk set, a hand telephone, a rigid support therefor, switching .ing mechanism located Within each of said forked extensions for operating said springs.

8. In a portable desk set, a cradle member, havingupwardly projecting extensions for receiving a hand telephone, switching springs adapted to be operated by said hand telephone when the same is associated with and disassociated from the cradle, and a plurality of switching mechanisms located between lsaid extensions for operating said sprm s.

9. n a telephone set, a cradle member having two oppositely located sets of forked extensions for receiving a hand telephone, movable members projecting upwardly from the center of each of said forked extensions,I

switching springs, and means operable by said movable members arranged to operate said springs.

10. In a telephone set, a cradle member having two oppositely located sets of forked extensions for receiving a hand telephone, switching springs, and switching members movably projecting upward from the center of each of said forked extensions for operating said springs. l

In witnessI whereof, I hereunto subscribe my name this 20th day of August, A. FD. 1925.

I f OTTO WEEBER. 

